*{
    margin: 0;
    padding: 0;
    list-style: none;
    box-sizing: border-box;
}
#bangzhu-box{
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    background: radial-gradient(circle, #bae1fe 0%, #e4f4fe 100%);
    #shang{
        height: 50px;
        transition: background-color 0.3s; /* 背景色过渡效果 */
        ul{
            height: 50px;
            display: flex;
            align-items: center;
            li{
                font-size: 20px;
                margin: 0 10px;
                img{
                    height: 50px;
                }
            }
        }
    }
    .sticky {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    background-color: #fff; /* 吸顶后背景色 */
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1); /* 可选：添加阴影效果 */
    z-index: 1000; /* 确保在其他元素上方 */
}
    #xia{
        flex: 1;
        height: 100%;
        h4{
            height: 30px;
            text-align: center;
            line-height: 30px;
            font-size: 20px;
            font-weight: normal;
            margin-top: 20px;
        }
        #con-box{
            display: flex;
            flex-direction: column;
            h5{
                height: 50px;
                line-height: 50px;
                font-size: 20px;
            }
            #xia-con-box{
                display: flex;
                div{
                    width: 300px;
                    height: 250px;
                    background: #fff;
                    border-radius: 10px;
                    margin:10px 100px;
                    p{
                        margin: 20px;
                    }
                    ul{
                        li{
                            margin:30px 35px;
                            list-style-type: disc; /* 默认，显示实心圆点 */
                        }
                    }
                    a{
                        text-decoration: none;
                        margin: 20px;
                        color: #2254f4;
                    }
                }
            }
            #xia-con-boxs{
                display: flex;
                flex-wrap: wrap;
                div{
                    width: 300px;
                    height: 250px;
                    background: #fff;
                    border-radius: 10px;
                    margin:10px 100px;
                    p{
                        margin: 20px;
                    }
                    ul{
                        li{
                            margin:30px 35px;
                            list-style-type: disc; /* 默认，显示实心圆点 */
                        }
                    }
                    a{
                        text-decoration: none;
                        margin: 20px;
                        color: #2254f4;
                    }
                }
            }
        }
    }
}